<%= raw t('notification.follow.'+ activity.receiver.subject.class.to_s.underscore, 
           :sender => link_to(truncate_name(activity.sender.name), polymorphic_url(activity.sender.subject)),
           :who => t('notification.who.'+ activity.receiver.subject.class.to_s.underscore,
                      :name => truncate_name(activity.receiver.name))) %>

